test: revert to clang

Author: ssaakaash

webrtc-sys/build.rs

@@ -318,7 +318,7 @@ fn configure_darwin_sysroot(builder: &mut cc::Build) {
     let sysroot = String::from_utf8_lossy(&sysroot.stdout);
     let sysroot = sysroot.trim();
 
-    let search_dirs = Command::new("cc").arg("--print-search-dirs").output().unwrap();
+    let search_dirs = Command::new("clang").arg("--print-search-dirs").output().unwrap();
 
     let search_dirs = String::from_utf8_lossy(&search_dirs.stdout);
     for line in search_dirs.lines() {